diff options
| author | Steve Wise <swise@opengridcomputing.com> | 2018-03-01 13:57:44 -0800 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2018-03-08 15:03:03 -0500 |
| commit | 00313983cda6f37f747058e58c1cb8fba02bc134 (patch) | |
| tree | 70e6323e9d53958672bb012c3641e97964e98b56 /include/rdma/restrack.h | |
| parent | a3b641af72ba899991ed847556951128ef41d52f (diff) | |
RDMA/nldev: provide detailed CM_ID information
Implement RDMA nldev netlink interface to get detailed CM_ID information.
Because cm_id's are attached to rdma devices in various work queue
contexts, the pid and task information at restrak_add() time is sometimes
not useful. For example, an nvme/f host connection cm_id ends up being
bound to a device in a work queue context and the resulting pid at attach
time no longer exists after connection setup. So instead we mark all
cm_id's created via the rdma_ucm as "user", and all others as "kernel".
This required tweaking the restrack code a little. It also required
wrapping some rdma_cm functions to allow passing the module name string.
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'include/rdma/restrack.h')
| -rw-r--r-- | include/rdma/restrack.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/rdma/restrack.h b/include/rdma/restrack.h index 2cdf8dcf4bdc..af886670af85 100644 --- a/include/rdma/restrack.h +++ b/include/rdma/restrack.h @@ -11,6 +11,7 @@ #include <linux/sched.h> #include <linux/kref.h> #include <linux/completion.h> +#include <linux/sched/task.h> /** * enum rdma_restrack_type - HW objects to track @@ -29,6 +30,10 @@ enum rdma_restrack_type { */ RDMA_RESTRACK_QP, /** + * @RDMA_RESTRACK_CM_ID: Connection Manager ID (CM_ID) + */ + RDMA_RESTRACK_CM_ID, + /** * @RDMA_RESTRACK_MAX: Last entry, used for array dclarations */ RDMA_RESTRACK_MAX @@ -150,4 +155,19 @@ int __must_check rdma_restrack_get(struct rdma_restrack_entry *res); * @res: resource entry */ int rdma_restrack_put(struct rdma_restrack_entry *res); + +/** + * rdma_restrack_set_task() - set the task for this resource + * @res: resource entry + * @task: task struct + */ +static inline void rdma_restrack_set_task(struct rdma_restrack_entry *res, + struct task_struct *task) +{ + if (res->task) + put_task_struct(res->task); + get_task_struct(task); + res->task = task; +} + #endif /* _RDMA_RESTRACK_H_ */ |